kfk9673@ritcv.UUCP (Karl Kingston) (02/14/88)
Hi Everybody.....
I have 2 problems with my EGA setup.
1) When I start up my EGA in Enhanced Color Mode, the 1st character is
reversed, blown to double width. The 2nd character is 1/2 it's size
and all other characters are normal. In Normal Color Mode, the EGA
monitor works fine. I am under the impression that the raster guns are
"bouncing" off the side of the tube. Is there a way to overcome this
problem by either adjusting the hardware or running a program that will
shift the screen over. The board is 100% IBM as well as the monitor.
Also, the EGA card is fully populated with 256K.
2) This is rather strange. In addition to the EGA card, I also have the
IBM Monochrome and Printer Adapter card(along with an IBM Monochrome
display). Now, if I set the dips on the EGA card so that the Monochrome
Adapter is the primary adapter, some programs (AQUAEGA.ARC for one) crash
since they don't seem to recognize the EGA card. But.. if I set the dips
so that the EGA is the primary adapter, everything works. Any ideas
as to what is happening here?
Any info would be *GREATLY* appreciated.
Thanks..
Karl Kingston
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Karl Kingston
UUCP: ..!rochester!ritcv!kfk9673
BITNET: KFK9673@RITVAX
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~gmd1@ihlpf.ATT.COM (Doughty) (02/16/88)
In article <207@ritcv.UUCP>, kfk9673@ritcv.UUCP (Karl Kingston) writes: > Hi Everybody..... > > I have 2 problems with my EGA setup. > > 1) When I start up my EGA in Enhanced Color Mode, the 1st character is > reversed, blown to double width. The 2nd character is 1/2 it's size > and all other characters are normal. In Normal Color Mode, the EGA > monitor works fine. I am under the impression that the raster guns are > "bouncing" off the side of the tube. ... > > <second question omitted since I don't know answer> > > Any info would be *GREATLY* appreciated. > > Thanks.. > Karl Kingston > No, the raster guns are not bouncing. The problem is that the board begins to display the characters while the monitor is still moving the beams back to the left side of the screen (call horizontal retrace). Since this horizontal retrace is right to left, any characters displayed at this time will be reversed. Also, the horizontal retrace is much faster that the left to right motion. Hence any characters displayed during this time will also be bigger. With regard to the second character, the beams appear to have just barely reversed direction at that point and are not yet scanning at the normal speed. Assuming the monitor has some adjustments you could try tweeking the horizontal hold or horizontal size to see if that will resolve the problem. I would stay away from any horizontal linearity adjustment however. Greg Doughty ihnp4!ihlpf!gmd1